期刊论文

Effects of planting patterns on ammonia volatilization and nitrogen and phosphorus loss in paddy fields

中文

农业环境科学学报

1672-2043

2021

40

07

1529-1537

10.11654/jaes.2020-1481

国家重点研发计划项目（2018YFD0800500）； 湖南省重点领域研究发展计划项目（2019NK2021）～～；

本校为第一机构

研究洞庭湖双季稻区不同种植方式下,稻田氨挥发量变化、田面水氮磷浓度动态特征以及不同土壤深度养分含量差异,可为水稻机械化精准施肥,防控面源污染提供理论依据。研究采用田间试验方法,设置农民习惯+直播(T1)、控释尿素减氮10%+直播(T2)和机插一次性施肥减氮10%(T3)3个处理,原位监测早稻基肥期稻田氨挥发,取样监测施肥后田面水总氮、总磷及不同形态氮磷浓度,收获期计产,并取0~20 cm和20~40 cm土壤测定其基本理化性状。结果表明,与T1相比,T3和T2田面水NH_(4)^(+)-N平均浓度分别降低46.04%和27.03%,氨挥发量分别降低18.62%和15.61%;田面水总氮平均浓度分别降低53.55%和22.96%,总磷浓度分别降低3...

The main objective of this study is to investigate the effects of different planting patterns on ammonia volatilization of rice fields, dynamic change in N and P concentrations of field water, and the nutrient content at different soil depths. This study aimes to provide a theoretical basis for the technical application and promotion of precision mechanized one-time fertilization and non-point source pollution prevention in the Dongting Lake double-cropping rice area. Three treatments, including farmer habit + direct seeding(T1), controlled-rel...